Improvement in machines for bending metal stirrups



l the reception of a nutfllz.

dthtited gieten @stent diiyiirr. f

JOHN H. DE VALIN,YOF BALTIMRE, MARYLAND.

Letters Patent No. 119,748, dated January 3, 1871.

IMPROVEMENT IN MACHINES FOR BENDING METAL STIRRUPS.

The Schedule referred to in these Letters Patent and making part of thesame.

description thereof', reference being had to the accom-l panyin gdrawing and to the letters of reference marked thereon making a part ofthis specification.

The nature of my invention consists in the construction and generalarrangement of a device for forming stirrups and bending and twistingbars of metal, as'will be hereinafter fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 is a side view,-and Figure 2 is a plan View of my entiremachine. A represents the block, with the anges a al at the bottom, theflange a1 being only on one side and the end. These flangesV are for thepurpose of securing the block to suitable standards.

a2 represents a shoulder on one end of the block` A, extending'on thetwo vertical sides and on the top, forming a guide.

a represents a part of' the lblock- A, projecting downward, and of thesame thickness as the rest of the block.

a4 represents arecess in the block, which extends from the bottom of theprojection a3 to near the top of the block, and of suticient depth toreceive the gauge C, making the vertical part thereof even with the sideof the block.

a5 represents a hole or slot through the block for Drepresents a boltscrewing intothe nut cl2, and passing vertically through the middle ofthe block. By a knuckle-joint the bolt D is secured to the clamp B atone end. The opposite end of the clamp B terminates in a handle, whichextends beyond the end of the block A. l f

Near each end ofthe block A there is annpright bolt, E E', passingvertically through the block, and secured by means of a nut, e.

The upper ends of the bolts E E extend above the block A, and have slotsthrough them for the reception of a key, L. v

The bolts E E are situated atequah distances from the middle bolt D, andthe clamp B has an oblong hole, b2, near the handle b1, so that theclamp can pass freely over the ends of the bolts E E', and the ke)T Lpnt into the slot with its under side bearing on the topbt the clamp B.The bolts EE have shoulders resting on the top of the block A.

The gauge() has a slot, o3, in its vertical part c1,

through which a bolt, M, passes and secures it to the I block A. Thehorizontal part c2 of the gauge extends laterally beyond'the verticalside of the block A, and is of any required length.

The lip-bolt F isl provided with a lip, f1, wings f2, and a key, f. Thewings f2 fit Vinto corresponding recesses in the holes in the block,which prevent the' bolt from turning. lhe key f3 is for the purpose ofdrawing the lip-bolt through the block.

The block A is provided with holes for the receptionzof the lip-bolt Fat convenient places in the vicin- .ity of the gauge C.

The'thickness-piece H is provided with lugs and countersunk holes forthe purpose of securing it by bolts to the block A. The inner face isvmade to lit on thc side of the block A, between the middle and` theshoulder a?, and the same side as the gauge C.

The lug h extends beyond the end ofthe block. The recess h1 ts over theprojection a2 of the block.

' There is a shoulder, h4, on the thickness-piece H, which, when Vboltedto its place on the block, comes even with the shoulder a2 of theblookfand serves for a guide in bending the stirrup.

On the opposite side of theblock A the thickness piece K is boltedopposite the piece H, the lug k1 coming opposite the lug k, and therecess k2 iitting over the projection a2. In both cases thetops ot' thethickness-pieces H and K come even with the top ot' the block A.

Ou the same side of the middle bolt, and on the opposite side of theblock from the gauge 0,. the thickness-piece G is bolted by means ofbolts, the top of said thickness-piece coming even with the top of theblock A, the-heads of the bolts in all cases being countersunk so as tomake the sides of themachine fair. The operation' of the machine isasfollows:

f The clamp B is raised, and the middle of the bar to be bent is placedin the middle of' the block A, against the shoulder a2 on top. The clampB is then brought down on top of the bar, and keyed there by means ofthe key L inthe bolt E. Both ends of the bar are then bent down againstthe sides of the block A and along the shoulders a2, (thethickness=pieces H K being removed,) thus forming the seat of thestirrup. lhe clamp .B is then unkeyed and raised, and the bent bar takenon" the block. n

The gauge() having been sct to the required distance from the top of theblock, the seat of the stirrup is then placed on the top of thehorizontal part cz thereof, with the two upright side-pieces of thestirrup against the block A. One side-piece of the 'stirrnp is thensecured by means of bringing it under the lip of the lip-bolt F, andkeying np the lip-boltV lby means ofthe key f3. The/side-peee is thentwisted `and bent down on the top of the block A. The clamp B is thenbrougbtdown on the stirrup,

and keyed fast by means of the key L in the bolt E.

` The end oi` the stirrup is bent down against the opposite side oftheblock A, thus forming one of-t-he straps of the stirrup. The clamp Bis then raised and the lip-bolt loosened, and the bar is taken off;- thelip-bolt is reversed, and, if necessary, changed to another hole in theblock A; the baris replaced on the block, with its seat resting, asbefore, on the horizontal part ofthe gauge G, and the other upright sidesecured by means of the lip-bolt. The bar is t-hen twisted, bent down onthe topof the block; the elampB brought down and keyed; the end of thebar bent down on the opposite side of the block A, and the stirrnp iscomplete.

The block A must not be greater in width than the narrowest stirrup tobe made. By'adding thicknesspieces H, K, and G, the stixrup can be madeof any desired dimensions. 4

Having thus fully described my invention,

Vhat I claim as new, and desire to secure by Let` ters Patent, is

1. In combination with the block A, constructed as described, withflanges a al, shoulders a?, projection a, and recess ai, the slottedgauge O, adjustedih the recess a* by means of' the screw M, and thelip-boit F, provided with lip f1, wings f2, and key f, allslibstantialiy as and for the purposes vherein set forth.

2. The, combination of the block A, bolts D E Ef, clamp B, vgauge C,lip-bolt F, .and with or without the thickness-pieces H K G, allconstructed and arranged as described, to operate substantially as andfor the f purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this21st day of J nly, 1870. J OHN` H. DE YALIN.

Witnesses:

J. H. W. ONION, J. M. MASON.

